Greenpeace Climb Nelson's Column In Protest At London's Air Pollution [Getty Images]

LONDON, ENGLAND - APRIL 18: A face mask is placed on the statue of Oliver Cromwell outside Parliament by Greenpeace protesters on April 18, 2016 in London, England. The demonstration was to highlight air pollution in Britain and targeted other statues in the city including Queen Victoria opposite Buckingham Palace, Nelson's Column and Eros at Piccadilly Circus. (Photo by Dan Kitwood/Getty Images)

Getty Images News Dan Kitwood